Dorner, a 33-year-old former Los Angeles police officer, is suspected of killing three people and wounding two.

Officials with the San Bernardino County Sheriff's Department said armored personnel carriers would be used to transport search teams into mountain areas, where they will comb the forest. With no sightings so far of Dorner, officials canceled a press briefing scheduled for noon Saturday.

The trail has gone cold since Dorner's Nissan Titan pickup was found Thursday morning engulfed in flames on a U.S. Forest Service dirt road between the Bear Mountain and Snow Summit ski resorts. But Saturday could offer the clearest weather in days, and perhaps the best chance to find the alleged killer.